TAS, Tas, tas, or TAs may refer to: Places Tasmania, Australia, an abbreviation Tas-Anna, a rural locality in Neryuktyayinsky 1-y Rural Okrug of Olyokminsky District in the Sakha Republic, Russia Tas
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6d7bfb62c5e5c13cb247a4ac1d1353213283460c6fd16a445c6a2bc43741e9. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ce2c31a8-3619-4522-a66b-5fc55cb06042.json and https://artists.proofprofile.net/proofs/artist/ce2c31a8-3619-4522-a66b-5fc55cb06042.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44d754c4b044aa6f7212899f73a2d37de8f5f2f79a0b34e86236f4952b97f96. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/LTF012100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029600d8096169f18be43a881bee39f4feca112426adbc8cf84ad965b69f98eb. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/LTF012100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3afeed673c535cd660f53a254199e696ca2fc31b08f9792eb3c167d056edc5. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/LTF012100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21040cd822c02928f2a18fe83cd058c2ec908448954b19088f02da88a1ae0587. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/LTF012300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829a21764efbd6d57d14d756fca59a38347e28cf930a69c30d726617b26ba4e5. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/LTF012300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e581ec6715d9deee070ff0c48eb15b31c29dd957ffa7a8005fff452391f145. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/LTF012300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a196ac720911cb30e9b7a0da017c2b2a005a541df33d3c43875da42d9fffaca. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/LTF012300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1c2ab6fc543a56d55c598c211389b174c1c351aa1270a49cf6de15258be79e. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/LTF012300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce35186697b7638cc864c018d6fdf977161d3a95b7660834d35b63b0b1d78353. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/LTF012300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f68fd1d9236d5f24ece443614c7069817adff1c1b2c2b9df6639dd897077c1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/LTF012300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327d7f2c4c35aa267dea0fba45ed5f07b6959ec16d41b47e2bb69e605f1b36bd. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/LTF012300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe35ecfd810bf95648eac325cb71113d0a32406b490df657342d7600df35f182. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/LTF012400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a31292d3f2b7632d7f1315a9e3e5ceb048cf6c0de1e2f223918e24ff2ede1f. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/LTF012400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf120760441cbe6c24a4ef0760d3a31f54a822d3c86727df0d2db57fdc5330abe. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/LTF012400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733517dff2070d0f301d2812758418eabc3e5ce61ab4ffde5db3cf2a745960e2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/LTF012400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe35ecfd810bf95648eac325cb71113d0a32406b490df657342d7600df35f182. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/LTF012400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e6d79da28ce81097752ed449c1040f9c89191be7e520c47fab4a87ebf29869. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/LTF012400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9dc95f7ecf90d183b5ef7309fd7a52ed1060e5601e6e9cbc011e32620c06a98. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/LTF012400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52797b77b6af9e4636557a9d38b4ef3df4d86da9b93b37807a5e8e6b0cd56ff. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/LTN012400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3880e50502714a168a51ef11cd1b78217e6ccddf5d0dccebd3fb46ffc8a9a5. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/LTF012400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe4422994f0ce70980e6c4063f14250f9d97c5d59ad962041af496ba6a5b7fd. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/LTF012400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60cae9496f5ade2a6ec527efad51516b2cea2bf1bfea705a098eca962eb4fc06. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/LTF012400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f4e1424f8c2a399c55d0cafca14a7c255877f8f7ff73012129206e0e189fee8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/LTF012400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7cb51a4ea33d9831acfdd84943a530a77d377fb28dfa77334eb226d942214f7. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/LTF012400021.